Basic example showing the Queue and MemoryPool API

Dependencies:   mbed-rtos mbed

mbed 2 and mbed OS 5

This is an mbed 2 example. mbed OS 5 has integrated the mbed library with mbed-rtos. For an mbed-os example, please see:

Import programrtos_queue

queue example

Files at this revision

API Documentation at this revision

Comitter:
emilmont
Date:
Fri Jul 13 11:22:59 2012 +0000
Parent:
0:e0607f77b5bc
Child:
2:60e763987e7b
Commit message:
First implementation

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed-rtos.lib Show annotated file Show diff for this revision Revisions of this file
--- a/main.cpp	Fri Jul 13 11:20:39 2012 +0000
+++ b/main.cpp	Fri Jul 13 11:22:59 2012 +0000
@@ -0,0 +1,41 @@
+#include "mbed.h"
+#include "rtos.h"
+
+typedef struct {
+    float    voltage;   /* AD result of measured voltage */
+    float    current;   /* AD result of measured current */
+    uint32_t counter;   /* A counter value               */
+} message_t;
+
+MemoryPool<message_t, 16> mpool;
+Queue<message_t, 16> queue;
+
+/* Send Thread */
+void send_thread (void const *argument) {
+    uint32_t i = 0;
+    while (true) {
+        i++; // fake data update
+        message_t *message = mpool.alloc();
+        message->voltage = (i * 0.1) * 33; 
+        message->current = (i * 0.1) * 11;
+        message->counter = i;
+        queue.put(message);
+        Thread::wait(1000);
+    }
+}
+
+int main (void) {
+    Thread thread(send_thread);
+    
+    while (true) {
+        osEvent evt = queue.get();
+        if (evt.status == osEventMessage) {
+            message_t *message = (message_t*)evt.value.p;
+            printf("\nVoltage: %.2f V\n\r"   , message->voltage);
+            printf("Current: %.2f A\n\r"     , message->current);
+            printf("Number of cycles: %u\n\r", message->counter);
+            
+            mpool.free(message);
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Fri Jul 13 11:22:59 2012 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-rtos/#01158bb7600c